Not very outstanding at all. I bought it last year and have used it a total of zero times (whose fault is that, mine, correct, but still, it stings that they have a shitty upgrade policy).

but you'd have to tell the customers the reason for the sale. Otherwise they would feel cheated and would demand the new version.

And revealing release month before actual release has its own shortcomings...

That would be approximately why I was able to get PaintCode v1 in a MacHeist bundle super cheap in January. Very worth it - if you're going to embrace the UI dynamics in iOS 7 and beyond, this is an incredibly efficient way to do it. An update of our cooking thermometer's app (http://supermechanical.com/range/app if you're curious) that's in review now will have a circular cooking timer widget - drag in a circle, see the wedge of a clock face you're selecting - and with PaintCode I just drew a wedge and designated the angle as a variable. Didn't have to think one bit about drawing arcs, and even better, it took away much of the penalty of tinkering with the look and feel of the interaction.